Filling space between animated paths

[Eric Santiago]

Hmm, convenient not sure.
I would render out a version with a solid color bg then re-import and use Roto.

You can still use the original path animation and use it as top layer.

[Filip Vandueren]

I’ve never in 20 years used it but: the effect Generate -> Paint Bucket can do this, if you don’t mind that the fill isn’t vectorial but a pixeleffect.